Fishing Tips for Beginners Fishing Adventure BlogIn 2011, 83% of Dublin Bay prawns, the tails of which are used in scampi, were found to have ingested microplastics; so had 63% of brown shrimp tested in Scotland, around the Channel and southern parts of the North Sea. Perhaps the saddest calculation is the estimate that by 2050 there will be more plastic in the ocean than fish. Farmed fish are fed wild fish of their billions. As well as eating this potentially polluted food, farmed fish also are fed antibiotics, just like in other animal farming, to avoid disease outbreak. Even so, ailment is common due to living in close confinement and squalid circumstances. Fish lice are extraordinarily common and might on occasion also be seen on fish in supermarkets.